This calculator outputs the how fast the Mercedes-Benz SLS AMG GT can go in each gear as calculated by the gear ratios, engine redline and tire size.
The ultimate top speed may be limted by the power, drag and aerodynamics of each individual car.

If you like this calculator use the Google +1 button:

Tire Size(345/30/20)

/
-

OR

Tire Diameter(inches)

Final Drive Ratio

Redline (RPM)

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

RPM

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

500

3.22

4.99

6.71

8.47

10.61

13.01

15.18

0

600

3.87

5.99

8.05

10.17

12.73

15.62

18.22

0

700

4.51

6.99

9.39

11.86

14.86

18.22

21.25

0

800

5.16

7.99

10.73

13.56

16.98

20.82

24.29

0

900

5.8

8.98

12.07

15.25

19.1

23.42

27.33

0

1000

6.45

9.98

13.41

16.95

21.22

26.03

30.36

0

1100

7.09

10.98

14.75

18.64

23.35

28.63

33.4

0

1200

7.74

11.98

16.09

20.34

25.47

31.23

36.44

0

1300

8.38

12.98

17.44

22.03

27.59

33.83

39.47

0

1400

9.03

13.98

18.78

23.73

29.71

36.44

42.51

0

1500

9.67

14.97

20.12

25.42

31.84

39.04

45.54

0

1600

10.32

15.97

21.46

27.11

33.96

41.64

48.58

0

1700

10.96

16.97

22.8

28.81

36.08

44.24

51.62

0

1800

11.61

17.97

24.14

30.5

38.2

46.85

54.65

0

1900

12.25

18.97

25.48

32.2

40.33

49.45

57.69

0

2000

12.9

19.96

26.82

33.89

42.45

52.05

60.73

0

2100

13.54

20.96

28.16

35.59

44.57

54.65

63.76

0

2200

14.19

21.96

29.51

37.28

46.69

57.26

66.8

0

2300

14.83

22.96

30.85

38.98

48.82

59.86

69.83

0

2400

15.48

23.96

32.19

40.67

50.94

62.46

72.87

0

2500

16.12

24.96

33.53

42.37

53.06

65.06

75.91

0

2600

16.77

25.95

34.87

44.06

55.18

67.67

78.94

0

2700

17.41

26.95

36.21

45.76

57.31

70.27

81.98

0

2800

18.06

27.95

37.55

47.45

59.43

72.87

85.02

0

2900

18.7

28.95

38.89

49.15

61.55

75.47

88.05

0

3000

19.35

29.95

40.24

50.84

63.67

78.08

91.09

0

3100

19.99

30.95

41.58

52.53

65.8

80.68

94.13

0

3200

20.64

31.94

42.92

54.23

67.92

83.28

97.16

0

3300

21.28

32.94

44.26

55.92

70.04

85.88

100.2

0

3400

21.93

33.94

45.6

57.62

72.16

88.49

103.23

0

3500

22.57

34.94

46.94

59.31

74.29

91.09

106.27

0

3600

23.22

35.94

48.28

61.01

76.41

93.69

109.31

0

3700

23.86

36.93

49.62

62.7

78.53

96.29

112.34

0

3800

24.51

37.93

50.97

64.4

80.65

98.9

115.38

0

3900

25.15

38.93

52.31

66.09

82.78

101.5

118.42

0

4000

25.8

39.93

53.65

67.79

84.9

104.1

121.45

0

4100

26.44

40.93

54.99

69.48

87.02

106.7

124.49

0

4200

27.08

41.93

56.33

71.18

89.14

109.31

127.52

0

4300

27.73

42.92

57.67

72.87

91.27

111.91

130.56

0

4400

28.37

43.92

59.01

74.57

93.39

114.51

133.6

0

4500

29.02

44.92

60.35

76.26

95.51

117.11

136.63

0

4600

29.66

45.92

61.69

77.96

97.63

119.72

139.67

0

4700

30.31

46.92

63.04

79.65

99.76

122.32

142.71

0

4800

30.95

47.92

64.38

81.34

101.88

124.92

145.74

0

4900

31.6

48.91

65.72

83.04

104

127.52

148.78

0

5000

32.24

49.91

67.06

84.73

106.12

130.13

151.81

0

5100

32.89

50.91

68.4

86.43

108.25

132.73

154.85

0

5200

33.53

51.91

69.74

88.12

110.37

135.33

157.89

0

5300

34.18

52.91

71.08

89.82

112.49

137.93

160.92

0

5400

34.82

53.9

72.42

91.51

114.61

140.54

163.96

0

5500

35.47

54.9

73.77

93.21

116.74

143.14

167

0

5600

36.11

55.9

75.11

94.9

118.86

145.74

170.03

0

5700

36.76

56.9

76.45

96.6

120.98

148.34

173.07

0

5800

37.4

57.9

77.79

98.29

123.1

150.95

176.11

0

5900

38.05

58.9

79.13

99.99

125.23

153.55

179.14

0

6000

38.69

59.89

80.47

101.68

127.35

156.15

182.18

0

6100

39.34

60.89

81.81

103.38

129.47

158.75

185.21

0

6200

39.98

61.89

83.15

105.07

131.59

161.36

188.25

0

6300

40.63

62.89

84.49

106.76

133.71

163.96

191.29

0

6400

41.27

63.89

85.84

108.46

135.84

166.56

194.32

0

6500

41.92

64.89

87.18

110.15

137.96

169.17

197.36

0

6600

42.56

65.88

88.52

111.85

140.08

171.77

200.4

0

6700

43.21

66.88

89.86

113.54

142.2

174.37

203.43

0

6800

43.85

67.88

91.2

115.24

144.33

176.97

206.47

0

6900

44.5

68.88

92.54

116.93

146.45

179.58

209.5

0

7000

45.14

69.88

93.88

118.63

148.57

182.18

212.54

0

7100

45.79

70.87

95.22

120.32

150.69

184.78

215.58

0

7200

46.43

71.87

96.57

122.02

152.82

187.38

218.61

0

RPM

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

Some additional information on how these are calculated:

When D is the diameter of the tire, the car moves forward a distance πD with each revolution of the tire. If there are F revolutions per unit of time, it moves forward at a speed of πD´F per unit of time. If D is in inches and F is in revolutions per minute (rpm), the above result will be in inches per minute. There are 63,360 inches in a mile and 60 minutes in an hour, so one inch per minute equals 60/63360 miles per hour or 1/1056 mph. So we have the following formula:

V(mph) = D(in) ´ F(rpm) ´ (π/1056)

In the automotive industry, the coefficient 1056/π is usually taken to be equal to 336 (exactly it is 336.1352398...) and the formula corresponding to the above is:

(mph)(gear ratio)(336) = (tire diameter in inches)(rpm)

With the above numerical approximation, both formulas are identical if we consider that (rpm)/(gear ratio) is the rate of rotation of the tires. So the "gear ratio" as the number of rotations of the driveshaft for each turn of the tire. This ratio is normally more than 1, except in overdrive gear. So, calling R the "gear ratio", your final answer is:

V(mph) = D(in) ´ F(rpm) ´ (π/1056) / R

or, approximately: V = (D ´ F) / (336 ´ R)

where V is the velocity (in mph), D the tire diameter (in inches), F the engine rpm, and R the gear ratio.